<!DOCTYPE html>
<html lang='en'>

<head>
    <meta charset='UTF-8'>
    <meta http-equiv='X-UA-Compatible' content='IE=edge'>
    <meta name='viewport' content='width=device-width, initial-scale=1.0'>
    <title>Document</title>
    <script src='../../vue.js'></script>
</head>

<body>
    <div id='app'>
        <h1>{{count}}</h1>
        <button @click="count++">累加</button>
      姓：  <input type="text" v-model="addName">
      名：  <input type="text" v-model="bddName">
      全名：{{FullName}}
      <br>
      {{boxName}}
    </div>
    <script>
        Vue.config.productionTip = false;
        const vm = new Vue({
            el: '#app',
            data() {
                return {
                    count:0,
                    addName:'',
                    bddName:''
                }
            },
            computed:{
                FullName(){
                    console.log('计算属性调用了');
                    return this.addName.toUpperCase() + '-' + this.bddName.toUpperCase()
                    
                },
                boxName(){
                 return   this.FullName + ':hello'

                }
            }
        })
    </script>
</body>

</html>